LONG-TERM DEBT (TABLES)

12 Months Ended

Dec. 31, 2011

Notes To Consolidated Financial Statements [Abstract]

Schedule of Maturities of Long-term Debt [Table Text Block]

(Millions of Dollars)	NU		CL&P		PSNH		WMECO
2012	$	329.3	$	62.0	$	-	$	-
2013		430.0		125.0		-		55.0
2014		275.0		150.0		50.0		-
2015		150.0		100.0		-		50.0
2016		15.4		15.4		-		-
Thereafter		3,449.6		1,891.3		949.5		338.8
Total	$	4,649.3	$	2,343.7	$	999.5	$	443.8

Schedule of Long-term Debt Instruments [Table Text Block]

CL&P		As of December 31,
(Millions of Dollars)		2011		2010
First Mortgage Bonds:
	7.875% 1994 Series D due 2024	$	139.8	$	139.8
	4.800% 2004 Series A due 2014		150.0		150.0
	5.750% 2004 Series B due 2034		130.0		130.0
	5.000% 2005 Series A due 2015		100.0		100.0
	5.625% 2005 Series B due 2035		100.0		100.0
	6.350% 2006 Series A due 2036		250.0		250.0
	5.375% 2007 Series A due 2017		150.0		150.0
	5.750% 2007 Series B due 2037		150.0		150.0
	5.750% 2007 Series C due 2017		100.0		100.0
	6.375% 2007 Series D due 2037		100.0		100.0
	5.650% 2008 Series A due 2018		300.0		300.0
	5.500% 2009 Series A due 2019		250.0		250.0
Total First Mortgage Bonds			1,919.8		1,919.8
Pollution Control Notes:
	5.85%-5.90% Tax Exempt Fixed Rate due 2016-2022		46.4		46.4
	5.85% Fixed Rate Tax Exempt due 2028 (1)		-		245.5
	5.95% Fixed Rate Tax Exempt due 2028		70.0		70.0
	4.375% Fixed Rate Tax Exempt due 2028 (1)		120.5		-
	1.25% Fixed Rate Tax Exempt due 2028 (1)		125.0		-
	One-Year Fixed Rate Tax Exempt due 2031(2)		62.0		62.0
Total Pollution Control Notes			423.9		423.9
Total First Mortgage Bonds and Pollution Control Notes			2,343.7		2,343.7
Fees and Interest due for Spent Nuclear Fuel Disposal Costs			244.1		243.8
Less Amounts due Within One Year(2)			(62.0)		(62.0)
Unamortized Premiums and Discounts, Net			(4.0)		(4.4)
CL&P Long-Term Debt		$	2,521.8	$	2,521.1
PSNH		As of December 31,
(Millions of Dollars)		2011		2010
First Mortgage Bonds:
	5.25% 2004 Series L due 2014	$	50.0	$	50.0
	5.60% 2005 Series M due 2035		50.0		50.0
	6.15% 2007 Series N due 2017		70.0		70.0
	6.00% 2008 Series O due 2018		110.0		110.0
	4.50% 2009 Series P due 2019		150.0		150.0
	4.05% 2011 Series Q due 2021(3)		122.0		-
	3.20% 2011 Series R due 2021		160.0		-
Total First Mortgage Bonds			712.0		430.0
Pollution Control Revenue Bonds:
	4.75%- 5.45% Tax Exempt Series B and C due 2021		198.2		198.2
	6.00% Tax Exempt Series D and E due 2021(3)		-		119.8
	Adjustable Rate Series A due 2021		89.3		89.3
Total Pollution Control Revenue Bonds			287.5		407.3
Unamortized Premiums and Discounts, Net			(1.8)		(0.9)
PSNH Long-Term Debt		$	997.7	$	836.4

WMECO		As of December 31,
(Millions of Dollars)		2011		2010
Pollution Control and Other Notes:
	Tax Exempt 1993 Series A, 5.85% due 2028	$	53.8	$	53.8
	Senior Notes Series A, 5.00% due 2013		55.0		55.0
	Senior Notes Series B, 5.90% due 2034		50.0		50.0
	Senior Notes Series C, 5.24% due 2015		50.0		50.0
	Senior Notes Series D, 6.70% due 2037		40.0		40.0
	Senior Notes Series E, 5.10% due 2020		95.0		95.0
	Senior Notes Series F, 3.50% due 2021		100.0		-
Total Pollution Control Notes and Other Notes			443.8		343.8
Fees and Interest due for Spent Nuclear Fuel Disposal Costs			57.3		57.2
Unamortized Premiums and Discounts, Net			(1.6)		(0.7)
WMECO Long-Term Debt		$	499.5	$	400.3
OTHER		As of December 31,
(Millions of Dollars)		2011			2010
Yankee Gas - First Mortgage Bonds:
	8.48% Series B due 2022	$	20.0	$	20.0
	7.19% Series E due 2012		4.3		8.6
	4.80% Series G due 2014		75.0		75.0
	5.26% Series H due 2019		50.0		50.0
	5.35% Series I due 2035		50.0		50.0
	6.90% Series J due 2018		100.0		100.0
	4.87% Series K due 2020		50.0		50.0
Total First Mortgage Bonds			349.3		353.6
Less Amounts due Within One Year			(4.3)		(4.3)
Unamortized Premiums and Discounts, Net			0.9		1.0
Total First Mortgage Bonds			345.9		350.3
NU Parent - Notes:
	7.25% Senior Notes Series A due 2012		263.0		263.0
	5.65% Senior Notes Series C due 2013		250.0		250.0
Total NU Parent - Notes			513.0		513.0
Less Amounts due Within One Year			(265.3)		-
Fair Value Adjustment			2.3		11.8
Other Long-Term Debt			595.9		875.1
Total NU Long-Term Debt		$	4,614.9	$	4,632.9